Source of what specific US laws Tiktok is in violation of. It is very easy to look at Chinese law and see that it is enforced equally across all services in the country, and that those that work within the law are welcome to operate. It isn't protectionism, Apple is a competitor for many Chinese products but are allowed to operate because they follow the law.
Not playground legal logic.
Okay, what specific law is Tiktok in violation of that no other social media app is in violation of? Even if it were a direct mouthpiece of the CPC [it isn't] that wouldn't mean it is violating any laws.
"We don't like Chinese people" isn't a valid legal argument.